diff options
Diffstat (limited to 'arch/arm/kernel/elf.c')
| -rw-r--r-- | arch/arm/kernel/elf.c | 25 |
1 files changed, 24 insertions, 1 deletions
diff --git a/arch/arm/kernel/elf.c b/arch/arm/kernel/elf.c index d0d1e83150c9..182422981386 100644 --- a/arch/arm/kernel/elf.c +++ b/arch/arm/kernel/elf.c @@ -1,8 +1,10 @@ +// SPDX-License-Identifier: GPL-2.0 #include <linux/export.h> #include <linux/sched.h> #include <linux/personality.h> #include <linux/binfmts.h> #include <linux/elf.h> +#include <linux/elf-fdpic.h> #include <asm/system_info.h> int elf_check_arch(const struct elf32_hdr *x) @@ -80,7 +82,7 @@ EXPORT_SYMBOL(elf_set_personality); * - the binary requires an executable stack * - we're running on a CPU which doesn't support NX. */ -int arm_elf_read_implies_exec(const struct elf32_hdr *x, int executable_stack) +int arm_elf_read_implies_exec(int executable_stack) { if (executable_stack != EXSTACK_DISABLE_X) return 1; @@ -89,3 +91,24 @@ int arm_elf_read_implies_exec(const struct elf32_hdr *x, int executable_stack) return 0; } EXPORT_SYMBOL(arm_elf_read_implies_exec); + +#if defined(CONFIG_MMU) && defined(CONFIG_BINFMT_ELF_FDPIC) + +void elf_fdpic_arch_lay_out_mm(struct elf_fdpic_params *exec_params, + struct elf_fdpic_params *interp_params, + unsigned long *start_stack, + unsigned long *start_brk) +{ + elf_set_personality(&exec_params->hdr); + + exec_params->load_addr = 0x8000; + interp_params->load_addr = ELF_ET_DYN_BASE; + *start_stack = TASK_SIZE - SZ_16M; + + if ((exec_params->flags & ELF_FDPIC_FLAG_ARRANGEMENT) == ELF_FDPIC_FLAG_INDEPENDENT) { + exec_params->flags &= ~ELF_FDPIC_FLAG_ARRANGEMENT; + exec_params->flags |= ELF_FDPIC_FLAG_CONSTDISP; + } +} + +#endif |